Taylor-Dunn SS5-34 Operation, Troubleshooting Manual page 62

SECTION 3
8. Remove the pinion housing assembly from the third member.
NOTE: Do not lose the shims!
9. Replace bearings, bearing races, and gears as needed.
10. Reassemble in reverse order and follow the instructions in Adjusting
Backlash and Reshimming the Pinion Bearing
a. Pre-lube all bearings and gears during reassembly.
b. Cross tighten ring gear bolts to 72 ft.-lbs.
c. If pinion bearing or gears are replaced, the drive must be
reshimmed.
d. Use new seals.
Adjusting Backlash
1. Install the correctly shimmed pinion gear and pinion gear housing.
2. Temporarily install the drive sprocket and brake drum. Torque the
pinion nut to 175ft.-lbs.
3. Tighten the carrier bearing cap bolts to 15 ft.-lbs.
4. Position the carrier assembly against the pinion gear. While rotating
the carrier, turn the adjusting nuts to contact the carrier bearings.
5. Loosen the adjusting nut on the toothed side of the ring gear.
6. Tighten the other nut so that there is no gear backlash, but not so
tight to cause binding.
7. Tighten the adjusting nut on the toothed side of the ring gear so that
there is .008 to .012 backlash.
8. Tighten the carrier bearing cap bolts to 40-55 ft.-lbs.
Reshiming the Pinion Bearing
1. Remove the pinion housing from the third member.
2. Install the drive gear and brake drum (or equivalent spacer) on to
the pinion shaft and tighten to 175ft.-lbs.
3. Check the torque required to rotate the pinion shaft. Torque spec is 7 to
10 in-lbs.
NOTE: Do not rotate bearings when dry. They must have a
lubricant or they will be damaged.
4. Add or remove shims as necessary to obtain the correct torque.
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